* {
  margin: 0;
  padding: 0;
}
.banner {
  margin: 0 auto;
}
.nav {
  width: 100%;
  background-color: #121212;
  height: 67px;
  overflow: hidden;
}
.nav-warp {
  width: 1200px;
  margin: 0 auto;
  display: flex;
  justify-content: space-between;
}
.nav .nav-right a {
  font-size: 16px;
  text-decoration: none;
  line-height: 67px;
}
.nav-left img {
  margin-top: 15px;
}
.nav-right a {
  color: #a8a8a8;
  border-radius: 8px;
  padding: 5px 10px;
}
.nav .nav-right a:hover {
  color: white;
  border: 1px solid #7b7b7b;
}
.nav-right .home {
  color: white;
}
.nav-right span {
  display: none;
}
.content {
  text-align: center;
}
.content-main {
  display: inline-block;
  max-width: 980px;
  width: 100%;
  overflow: hidden;
}
.content-main .content-img1,
.content-main .content-img2,
.content-main .content-img3 {
  position: relative;
}
.content-img1 img,
.content-img3 img {
  width: 588px;
  height: 160px;
  float: left;
}
.content-img2 img {
  width: 588px;
  height: 160px;
  float: right;
}
.content-txt {
  width: 40%;
  overflow: hidden;
  text-align: left;
  float: left;
}
.content-txt2 {
  width: 40%;
  overflow: hidden;
  text-align: right;
  float: left;
}
.jiange {
  width: 20px;
  height: 160px;
  float: left;
  margin-right: 20px;
  background-color: #b0b0b0;
}
.jiange2 {
  width: 20px;
  height: 160px;
  float: right;
  margin-left: 20px;
  background-color: #b0b0b0;
}
.content-txt h2,
.content-txt2 h2,
.content-txt p,
.content-txt2 p {
  padding-top: 10px;
}
.content-img1 #pic1 {
  position: absolute;
  left: 0;
  top: 0;
  display: none;
}
.content-img2 #pic2 {
  position: absolute;
  right: 0;
  top: 160px;
  display: none;
}
.content-img3 #pic3 {
  position: absolute;
  left: 0;
  top: 320px;
  display: none;
}
.footer {
  text-align: center;
  margin-top: 45px;
}
.footer-img a {
  display: inline-block;
  margin: 0 auto;
  text-decoration: none;
  position: relative;
}
.footer-bottom a {
  display: inline-block;
  margin-top: 10px;
  text-align: center;
  position: relative;
}
#img1,
#img2,
#img3,
#img4,
#img5 {
  position: absolute;
  left: 0;
  top: 0;
  margin: 0 auto;
}
#img1:hover,
#img2:hover,
#img3:hover,
#img4:hover,
#img5:hover {
  display: none;
}
.footer-img img {
  width: 25px;
}
.footer-txt {
  margin-top: 30px;
}
.footer-txt h6 {
  text-align: center;
  font-weight: 100;
}
@media screen and (max-width: 1000px) {
  .top,
  .bottom,
  .center {
    width: 100%;
    margin: 0 auto;
  }
  .content-img1 img,
  .content-img2 img,
  .content-img3 img {
    width: 100%;
  }
  .content-img1 #pic1 {
    position: absolute;
    left: 0;
    top: 0;
    margin: 0 auto;
    display: none;
  }
  .content-img2 #pic2 {
    position: absolute;
    right: 0;
    top: 274px;
    display: none;
  }
  .content-img3 #pic3 {
    position: absolute;
    left: 0;
    top: 548px;
    display: none;
  }
  .jiange {
    display: none;
  }
  .content-txt {
    width: 100%;
    height: 114px;
    text-align: center;
  }
  .content-txt2 {
    width: 100%;
    height: 114px;
    text-align: center;
  }
}
@media screen and (max-width: 900px) {
  .nav-right a {
    display: none;
  }
  .nav {
    position: relative;
  }
  .nav-right span {
    position: absolute;
    top: 16px;
    right: 0;
    width: 39px;
    display: block;
  }
  .content-img1 #pic1 {
    position: absolute;
    left: 0;
    top: 0;
    display: none;
  }
  .content-img2 #pic2 {
    position: absolute;
    right: 0;
    top: 274px;
    display: none;
  }
  .content-img3 #pic3 {
    position: absolute;
    left: 0;
    top: 548px;
    display: none;
  }
  .jiange {
    display: none;
  }
  .content-txt {
    width: 100%;
    height: 114px;
    text-align: center;
  }
  .content-txt2 {
    width: 100%;
    height: 114px;
    text-align: center;
  }
}
